using System;
using System.Collections.Generic;
using System.Threading.Tasks;
using Enyim.Caching.Memcached.Results;
using Enyim.Caching.Memcached.Results.Extensions;

namespace Enyim.Caching.Memcached.Protocol.Binary
{
    public abstract class BinarySingleItemOperation : SingleItemOperation
    {
        protected BinarySingleItemOperation(string key) : base(key) { }

        protected abstract BinaryRequest Build();

        protected internal override IList<ArraySegment<byte>> GetBuffer()
        {
            return this.Build().CreateBuffer();
        }

        protected abstract IOperationResult ProcessResponse(BinaryResponse response);

        protected internal override IOperationResult ReadResponse(PooledSocket socket)
        {
            var response = new BinaryResponse();
            var retval = response.Read(socket);

            this.Cas = response.CAS;
            this.StatusCode = response.StatusCode;

            var result = new BinaryOperationResult()
            {
                Success = retval,
                Cas = this.Cas,
                StatusCode = this.StatusCode
            };

            IOperationResult responseResult;
            if (!(responseResult = this.ProcessResponse(response)).Success)
            {
                result.InnerResult = responseResult;
                responseResult.Combine(result);
            }

            return result;
        }

        protected internal override async ValueTask<IOperationResult> ReadResponseAsync(PooledSocket socket)
        {
            var response = new BinaryResponse();
            var retval = await response.ReadAsync(socket);

            this.Cas = response.CAS;
            this.StatusCode = response.StatusCode;

            var result = new BinaryOperationResult()
            {
                Success = retval,
                Cas = this.Cas,
                StatusCode = this.StatusCode
            };

            IOperationResult responseResult;
            if (!(responseResult = this.ProcessResponse(response)).Success)
            {
                result.InnerResult = responseResult;
                responseResult.Combine(result);
            }

            return result;
        }

        protected internal override Task<bool> ReadResponseAsync(PooledSocket socket, Action<bool> next)
        {
            throw new NotImplementedException();
        }
    }
}

#region [ License information          ]
/* ************************************************************
 * 
 *    Copyright (c) 2010 Attila Kisk? enyim.com
 *    
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *    
 *        http://www.apache.org/licenses/LICENSE-2.0
 *    
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 *    
 * ************************************************************/
#endregion
